<!DOCTYPE html>
<html lang="zn-CH">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div id="page">
        <div id="head">
            <p>head</p>
        </div>
    </div>
    <div id="body">
        <div class="main">
            <div class="main-wrap">
                <p>Main</p>
            </div>
        </div>
        <div class="sub">
            <p>Sub</p>
        </div>
        <div class="Extra">
            <p>Extra</p>
        </div>
    </div>
    <div id="foot">
        <p>Footer</p>
    </div>
</body>
</html>